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Message Store Cleanup

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Message Store Cleanup - 30.Aug.2010 5:33:54 PM   


Posts: 1
Joined: 30.Aug.2010
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I definitely need some expert advice re: my Exchange server and possibly creating a new storage group, and separating out some mailboxes.  Here's the situation.

I am currently running Exchange 2003 SP2 (6.5 Bld 7638.2)
About 125 mailboxes in a single message store.  The drive which currently houses the message store & storage group is at about 90% capacity.  the priv1.edb is at 170gig, the priv1.stm at 98gig.  There are no limits set on mailboxes in this group.  Most are abouve 2gig, with a few at 10-12gig.

I have implemented an email archiving system (Barracuda Mail Archiver) and have begun whittling down some o the mailboxes.  But I really want to run an offline defrag to recover some whitespace, but at these sizes, I'd be looking at 24 hours minimum offline, which is totally not feasible. 

So my plan is to create a separate storage group and break out some of those largest mailboxes to the new storage group, about 12 of them or so.  Hopefully after they have purged quite a bit as a result of the archiving solution.  Plus most of those high volume users belong to a specific business unit which would make sense to break out anyway.  So I'd move those to a new storage group on a different drive on the same system which has about 120gig available. And then run esutil on that group.

A couple questions. 

1. Is this a good plan?  any other methods I should be considering for reducing the size of that huge message store?

2. Some guides or tips for migrating mailboxes to a new message store/storage group?  Anything I really need to be aware of before doing this?

3. If after moving those mailboxes, will the original message store be reduced in size, or do I have to run esutil against that as well to recover the space formerly used by those moved mailboxes?

Any advice, suggestions and cautionary tales would be most appreciated.


Post #: 1
RE: Message Store Cleanup - 30.Aug.2010 7:28:16 PM   


Posts: 8232
Joined: 7.Jan.2004
From: California, USA
Status: offline
The EDB and STM files never shrink on their own - ever.  The strategy of moving mailboxes into a clean store works best when you move all the mailboxes, then delete the original store.  That allows you to keep the stores online the entire time.



Dean T. Uemura
Microsoft MVP - Exchange (2007-2011)

(in reply to kenmoody)
Post #: 2
RE: Message Store Cleanup - 13.Jan.2011 9:55:02 AM   


Posts: 1
Joined: 6.Sep.2010
Status: offline
How did that go for you?

I put in a Barracuda Archiver and defragged my database files, and recovered about 80% of the space by stubbing attachments, the Archiver account has the biggest mailbox now. Moving is straight forward, the users can be online, and no network effect if it's to a database on the same server.


(in reply to kenmoody)
Post #: 3

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